We have some hosted PBX customers that have been experiencing voice quality issues while using cable and DSL circuits. We need to get some type of QoS configured on the edge device and/or phones themselves. We need keep voice traffic as priority to keep voice quality high during high circuit utilization.
Here is a typical setup:
- Cisco 1800 series router (mostly 1841's) as the edge device
- VPN from customer site to our VPN concentrator
- Grandstream GXP2100 phones
Good tricks for Cisco router to handle QoS well?